T28P + EXP39 BLF dialling fails when dialled extension is receiving calls

[Benoiti]

Hi, this issue is on the same handsets as my prior topic.

When there is an incoming call to a station (A) and another station (B) presses the console BLF for A, the call fails and the extension number is duplicated on the phone's screen, eg. if the extension number is 123, then the screen displays 123123.

However, in the same scenario, if the extension number for A is dialed from the keypad of B while A is already ringing, the call works normally. So it seems that the console has trouble

I've attached the pcap and log.